Grace patrolled the train seeing to the others and chatting with first years who were nervous.. She couldn't help herself when she saw those who were younger needing an older sister type.

This was likely due to her being the youngest in her own family and knowing she would be the last. It was why she was so protective of her nieces, she loved all three but most especially Clarice. 
Clarice unlike her sisters didn't act as if it were strange to have an aunt so close to their age. She was more like a little sister to Grace and just thinking about it like that made Grace smile.

As she passed one compartment she spotted poor Willow Matthews with Acacia Cornet but luckily a fellow Gryffindor Samantha Carlson was there with her.
Grace had tried to chat to Willow on several occasions but the girl was so shy she seemed ready to run at any moment.
Sighing she began her walk again.
Soon she found her niece sitting in a compartment and joined her with a hug before sitting next to her.

[B]"Hi Clarice how I've missed you, I do so hope you've had a lovely summer with you dad an sisters."[/B] says Grace taking Clarice's hands in her own